Here's some information on the Lord Chancellor's position in the House of Lords: http://www.explore.parliament.uk/search/data.as...
Clement • Link
Updated link for Phil's post above:
"The Lord High Chancellor of Great Britain, or Lord Chancellor and in former times the Chancellor of England and the Lord Chancellor of Scotland, is one of the most senior and important functionaries in the government of the United Kingdom, and its predecessor states. He is a Great Officer of State, and is appointed by the Sovereign on the advice of the Prime Minister and is, by convention, always a peer, although there is no legal impediment to the appointment of a commoner." from
...a more extensive history of this office which closely missed abolition in 2004.
On the Great Seal:
Chart showing the number of references in each month of the diary’s entries.